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# TB_chapter24 - Chapter 24 Wave Optics CHAPTER 24 Conceptual...

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Chapter 24, Wave Optics C HAPTER 24 Conceptual Questions C1. In a Young’s double-slit experiment, both the wavelength and the slit separation are increased by 50%. What happens to the distance between two adjacent bright fringes? a. It increases by 50%. b. It decreases by 50%. c. The distance stays the same. d. The distance increases by a 100% or more. C2. In a Young’s double-slit experiment, what happens to the angular separation between the fringes when the wavelength is increased at the same time that the slit separation is decreased? C3. A Young’s double-slit experiment is performed in air and then the apparatus is submerged in water. What happens to the fringe separation, and what can be used to explain the change, if any? C4. Diffraction grating #1 has half the lines/cm that diffraction grating #2 does. When used with a certain wavelength of light, both gratings give first order maxima. Which of the following statements is true for the same wavelength of light. a. Both gratings must also give second order maxima. b. Grating #1 must give a second order maximum. c. Grating #2 must give a second order maximum. d. It is possible that neither grating gives a second order maximum. C5. Light travels from outside a building to inside through a pane of glass. Which of the following is true regarding the phase change upon reflection in the case? glass. 155

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Chapter 24, Wave Optics 24.2 Young’s Double-Slit Experiment 1. Interference effects observed in the early 1800s were instrumental in supporting a concept of the existence of which property of light? a. polarization b. particle nature c. wave nature d. electromagnetic character
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